[PATCH] D58675: [clang] Adds `-ftime-trace` option to clang that produces Chrome `chrome://tracing` compatible JSON profiling output dumps

[Anton Afanasyev via Phabricator via cfe-commits]

anton-afanasyev marked 2 inline comments as done.
anton-afanasyev added inline comments.


================
Comment at: cfe/trunk/lib/CodeGen/BackendUtil.cpp:1426-1431
   EmitAssemblyHelper AsmHelper(Diags, HeaderOpts, CGOpts, TOpts, LOpts, M);
 
   if (CGOpts.ExperimentalNewPassManager)
     AsmHelper.EmitAssemblyWithNewPassManager(Action, std::move(OS));
   else
     AsmHelper.EmitAssembly(Action, std::move(OS));
----------------
lebedev.ri wrote:
> This isn't covered by any timer; if you look in `BackendUtil.cpp`,
> `EmitAssemblyHelper` actually has `CodeGenerationTime("codegen", "Code Generation Time")` timer.
Thanks, I'm to add it.


================
Comment at: llvm/trunk/lib/IR/LegacyPassManager.cpp:1686
 
+  llvm::TimeTraceScope TimeScope("OptModule", M.getName());
   for (Function &F : M)
----------------
lebedev.ri wrote:
> I think this may be the wrong place for this.
> This includes the entirety of the pipeline, including all of llvm back-end stuff.
Ok, I'm just to delete this line, this block is outputted by `MPPassManager::runOnModule()` as well. This is just a section to see module name rather than to cover proper part of pipeline.


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D58675/new/

https://reviews.llvm.org/D58675